Matthias Braun 6a383369f9 PGOInstrumentation, GCOVProfiling: Split indirectbr critical edges regardless of PHIs ...

The `SplitIndirectBrCriticalEdges` function was originally designed for
`CodeGenPrepare` and skipped splitting of edges when the destination
block didn't contain any `PHI` instructions. This only makes sense when
reducing COPYs like `CodeGenPrepare`. In the case of
`PGOInstrumentation` or `GCOVProfiling` it would result in missed
counters and wrong result in functions with computed goto.

Differential Revision: https://reviews.llvm.org/D120096

2022-02-23 16:27:37 -08:00

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